A player asked me about this and I wasn't sure how to answer. He wants to know whether the stunt (Off-Hand Weapon Training) stacks with the power (Inhuman Strength) when determining attack stress.
Let's say you're dual-wielding swords (Weapon:2). With Inhuman Strength, your attack becomes +4 Stress on a hit with a single sword. With the stunt, you add half of the off-hand weapon's rating to the attack. Does the off-hand weapon also get the Inhuman Strength bonus? Does that attack get a +5 Stress bonus or a +7 Stress bonus?